The Results - Report subtab shows the average strain and stress tensor, as well as the average Von Mises and hydrostatic strain and stress for each computation step.

If an external strain or stress was defined, the entered value also appears in the result file in the third column of the respective table. For instance, ff a strain of 2% was applied, the XX column for the Average Strain table will consistently show a value of 2%.

On the left, find the post processing panel where to define the Load Sign Definition, Report Settings and Plot Settings. The plot settings are explained below.

Decide whether the Compression is Positive or the Tension is Positive. This changes the sign for the tensor values. This setting also changes the plot under the Plots tab.

Under the Report Settings change the Report Stress Unit (GPa, MPa or KPa) and the Report Strain Unit (% or 1), for example:

After the settings are as desired, click Apply to change the report. If Back-up result file is checked, the original result file is saved inside the result folder as described in the Result Viewer chapter.

Under the Plots tab the plot shows the State of Charge versus Von-Mises Stress, by default.  

Use the Post-Processing panel on the left to show other plots. Under Plot Settings choose the parameters to plot from the pull-down menus for X-Axis and Y-Axis. Click Apply to load the new plot. If Back-up result file is checked, the original result file is saved inside the result folder as described in the Result Viewer chapter.

The pull-down menu Plot Options contains the options to edit the axis settings and the graph styles, which are also available when right-clicking in the plot. They are described in the Result Viewer chapter.

On the Strain/Stress Visualization tab, the volume fields for each simulation step can be loaded by clicking on the Load button for Solution File (*.das). If the deformed geometry and the volume fields for the deformed geometry are written to the hard disk (see Output tab), they can be loaded for visualization here as well. For details on the (deformed) solution files, we refer to the ElastoDict chapter.

Visualize e.g. the von Mises Stress and the strain component XX in the battery after expansion, by loading the Solution File (*.das), selecting the volume fields to load and clicking OK.

In the visualization of the strain component XX in the active materials, positive values are visible in the graphite particles. They are expanding due to lithium intercalation in the anode while charging the battery cell. In contrast to this, the NMC particles in the cathode show negative values. They are shrinking due to de-intercalation of lithium.

The von Mises Stress in the cathode shows its highest values at the boundary of the NMC grains where they are in contact with neighboring grains. This is reasonable since breaking contacts during shrinking of the active material is not yet possible in BatteryDict-Degradation.

On the Create Videos tab, a video visualizing the change of one of the volume fields during a BatteryDict-Degradation simulation can be visualized.

Click Create Video to generate the video with the default settings. Once the video is created successfully, the button Play Video gets active.

Select Edit Parameters to modify the settings for the video generation.

With Select Invisible Material ID one material can be selected to be invisible in the video. This can be e.g. the pore material.

Choose the Volume Field to be shown in the plot. Dependent on the selection here, additional parameters need to be defined.

If Mises Stress or Mises Strain is selected, the minimal and maximal stress or strain values can be set for the color map.

Select Manual to choose another volume field available for the visualization. Additional to minimum and maximum value, the name of the image respectively field needs to be chosen as well.

For scalar fields like von Mises Strain, image and field names are the same. For vector and tensor fields, the field name uses the direction as suffix. In the example shown here, the image name is Strain, the field name StrainXX. If the volume field is loaded into the visualization area, image and field names are visible e.g. under Volume Files on the left of the Visualization area.

Choose None, if no volume field at all should be visualized.

If volume fields should be visualized together with the structure Select the Clipping Direction for the structure.

Check Manual Render Settings to change the options of the structure renderer. More about these settings can be found in the Visualization chapter.

The value in Video Duration defines the overall length of the video in seconds.

If Show Deformation is checked, the video is based on the deformed geometries and volume fields. Otherwise, it shows the values of the volume fields in the undeformed geometry.

The result folder of a degradation simulation contains the initial and final .cap file of the previously run charging simulation and the *.das files with the volume fields created in the mechanical simulation for the undeformed geometry. If selected on the Output tab, it contains additionally the deformed geometry and the *.das files for the deformed geometry for each step.

The other files are needed internally for running the mechanical simulation.